<template>
    <div class="add-role">
      <header class="add-header">
        <div class="left">
          <span class="arrow" @click="$router.back()"><i class="el-icon-arrow-left" />返回</span>
  
          <span>|</span>
  
          <span>编辑角色</span>
  
        </div>
  
        <div class="right">
          黑马程序员
        </div>
  
      </header>
      <main class="add-main">
        <div class="step-container">
          <el-steps direction="vertical" :active="activeStep">
            <el-step title="角色信息" />
            <el-step title="权限信息" />
            <el-step title="检查并完成" />
          </el-steps>
        </div>
  
        <div v-show="activeStep === 1" class="form-container">
          <div class="title">角色信息</div>
  
          <div class="form">
            <el-form
              class="form-box"
              ref="roleForm"
              :model="roleForm"
              :rules="roleRules"
            >
              <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="roleForm.roleName" />
              </el-form-item>
  
              <el-form-item label="角色描述" prop="remark">
                <el-input v-model="roleForm.remark" />
              </el-form-item>
            </el-form>
          </div>
        </div>
  
        <div v-show="activeStep === 2" class="form-container">
          <div class="title">权限配置</div>
  
          <div class="form">
            <div class="tree-wrapper">
              <div v-for="item in treeList" :key="item.id" class="tree-item">
                <div class="tree-title">{{ item.title }}</div>
                <el-tree
                  :data="item.children"
                  :props="{ label: 'title' }"
                  show-checkbox
                  default-expand-all
                  ref="tree"
                  node-key="id"
                  highlight-current
                />
              </div>
            </div>
          </div>
        </div>
  
        <div v-show="activeStep === 3" class="form-container">
          <div class="title">检查并完成</div>
          <div class="form">
            <div class="info">
              <div class="form-item">角色名称：{{ roleForm.roleName }}</div>
  
              <div class="form-item">角色描述：{{ roleForm.remark }}</div>
  
              <div class="form-item">角色权限：</div>
  
              <div class="tree-wrapper">
                <div
                  v-for="item in disableTreeList"
                  :key="item.id"
                  class="tree-item"
                >
                  <div class="tree-title">{{ item.title }}</div>
  
                  <el-tree
                    ref="disabledTree"
                    :data="item.children"
                    show-checkbox
                    default-expand-all
                    node-key="id"
                   
                    :props="{ label: 'title' }"
                    
                  />
                </div>
              </div>
            </div>
          </div>
        </div>
      </main>
  
      <footer class="add-footer">
        <div class="btn-container">
          <el-button v-if="activeStep > 1" @click="decreseStep">上一步</el-button>
  
          <el-button v-if="activeStep < 3" type="primary" @click="increseStep"
            >下一步</el-button
          >
          <el-button v-if="activeStep === 3" type="primary" @click="editRole">确认添加</el-button>
        </div>
      </footer>
    </div>
  </template>
    
  <script>
  
  import { getTreeListApi,editRoleApi,getPermisionByIdApi } from "@/api/system";
  function addDisabled(datas) {
    datas.forEach((item) => {
      item.disabled = true;
      if (item.children) {
        addDisabled(item.children);
      }
    });
  }
  export default {
    data() {
      return {
        activeStep: 1,
        treeList: [],
        disableTreeList:[],
        roleForm: {
          roleName: "",
          remark: "",
          perms: [],
          roleId: this.$route.query.id,
        },
        roleRules: {
          roleName: [
            { required: true, message: "请输入角色名称", trigger: "blur" },
          ],
          remark: [
            { required: true, message: "请输入角色描述", trigger: "blur" },
          ],
        },
      };
    },
    created() {
      this.getTreeList();
      this.getRoleData();
    },
    methods: {
    //用于编辑功能回显角色信息
      async getRoleData(){
       let res = await getPermisionByIdApi(this.$route.query.id)
       this.roleForm.roleName = res.data.roleName
       this.roleForm.remark = res.data.remark
       this.roleForm.perms = res.data.perms
       //权限树数据回显
       this.$refs.tree.forEach((item,index)=>{
        item.setCheckedKeys(this.roleForm.perms[index])
       })
      },
      async editRole(){
          await editRoleApi(this.roleForm)
          this.$message.success('编辑成功')
          this.$router.back()
      },
      //确保至少选择了一个权限,才能下一步
      ToFinalStep() {
       this.roleForm.perms = []
        this.$refs.tree.forEach((item) => {
          this.roleForm.perms.push(item.getCheckedKeys());
        });
        if (this.roleForm.perms.flat().length >= 1) {
          this.activeStep++;
        } else {
          this.$message.error("请至少选择一个权限");
        }
      },
      async getTreeList() {
        let res = await getTreeListApi();
        this.treeList = res.data;
        this.disableTreeList = JSON.parse(JSON.stringify(res.data))
        addDisabled(this.disableTreeList)
      },
      decreseStep() {
        if (this.activeStep === 1) return;
        this.activeStep--;
      },
      increseStep() {
        
        if (this.activeStep === 2){
          this.ToFinalStep();
        }
        if (this.activeStep === 3){
          this.$refs.disabledTree.forEach((item,index) => {
            item.setCheckedKeys(this.roleForm.perms[index]);
          });
        }
        if (this.activeStep === 1) {
          this.$refs.roleForm.validate((valid) => {
            if (valid) {
              this.activeStep++;
            }
          });
        }
      },
    },
  };
  </script>
    
    <style scoped lang="scss">
  .add-role {
    background-color: #f4f6f8;
    height: 100vh;
  
    .add-header {
      display: flex;
      justify-content: space-between;
      padding: 0 20px;
      height: 64px;
      line-height: 64px;
      font-size: 16px;
      font-weight: bold;
      background-color: #fff;
  
      .left {
        span {
          margin-right: 4px;
        }
  
        .arrow {
          cursor: pointer;
        }
      }
  
      .right {
        text-align: right;
      }
    }
  
    .add-main {
      position: fixed;
      top: 64px;
      bottom: 88px;
      width: 100%;
      overflow-y: auto;
      background: #f4f6f8;
      padding: 20px 230px;
      display: flex;
      .step-container {
        height: 400px;
        width: 200px;
      }
      .form-container {
        flex: 1;
        background-color: #fff;
        overflow-y: auto;
        .title {
          height: 60px;
          line-height: 60px;
          padding-left: 20px;
        }
        .form {
          margin-bottom: 20px;
          padding: 20px 65px 24px;
          .el-form {
            display: flex;
            flex-wrap: wrap;
          }
          .info {
            font-size: 14px;
            color: #666;
            .form-item {
              margin-bottom: 20px;
            }
          }
        }
        .form-box {
          width: 600px;
          display: flex;
          flex-direction: column;
        }
      }
    }
  
    .add-footer {
      position: fixed;
      bottom: 0;
      width: 100%;
      padding: 24px 50px;
      color: #000000d9;
      font-size: 14px;
      background: #fff;
      text-align: center;
      z-index: 10001;
    }
    .tree-wrapper {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      .tree-item {
        flex: 1;
        padding: 0px 4px;
        text-align: center;
        .tree-title {
          background: #f5f7fa;
          text-align: center;
          padding: 10px 0;
          margin-bottom: 12px;
        }
      }
    }
  }
  </style>